Is it possible that i’m asexual?

I (19F) have never felt really attracted to someone. I've dated a few times before but usually i only feel something like "oh because we're a couple i have to do what my partner would like me to do" (something like constantly chatting him, etc). I've liked someone before but usually it only lasted for 2 weeks.

P.S : sorry for any mistakes in my wording, english is not my main language.